Milking-machine.



Patented Nov. 2, 1915.

' 3 SHEETS-SHEET I.

j f f? MILKING MACHINE. I

Izwezziam Jimmie Hwwzlbwzls.

C. H. DAVIS & A. D. CUFF.

' APPLICATION FILED JUNE 2. 1914.

WI NEISSESI' W Maj/Z AT ORNEY.

C.- H. DAVIS & A. D. CUFF. .MILKING MACHINE. APPLICATION FILED JUNE 2.1914.

1. v\ WW m Nm W I a A M Q/ J W flm W n fla m W J J/ fl v\v E W u Wm J QJW 5% k fflv v M F & Q J 5 J 3M l [k 7. 5 M s 1 N 1, W W

C. H. DAVlS & A. D. CUFF.

MILKING MACHINE.

APPUCATION FILED IUNE 2. 1914.

1 1 59,1 85. Patented Nov. 2, 1915. I

3 SHEETSSHEET 3.

WITNESSES, [aw/flaw.

- A TTUR/VEY UNITED STATES PATENT OFFICE.

CLAUDE HUDSON DAVIS, 0F WANGANUI, AND ALAN DEVEREAUX CUFF, OF GO NVILLE,

' WANGAENUI, NEW ZEALAND.

MILKiNG-MACHINE.

Specification of Letters Patent.

Patented Nov. 2, 19.15.

' Application filed June 2, 1914. Serial No. 842,353.

T 0 all whom it may concern:

Be it known that we, CLAUDE HUDSON DAVIS and ALAN DEVEREAUX CUFF,subjects of the King of Great Britain, residing at N o. 10 ChurchPlace,'Wanganui, New Zealand, and Manuwahe, Carlton Terrace, Gonville,.Vanganui, New Zealand, respectively, have invented new and useful Im-.

- the vacuum in the pipe lines, and in which the pulsation of the innerlining of the teat cups is produced by alternately extracting air from,and in admitting air to an annular space between said inner lining andthe rigid outer wall of the teat cup.

The object of the present invention is to provide improvements intheejecting means,

teat cups and pulsating means in order to simplify the construction andarrangement of the machine and to render the same more efiicient.

The invention will be described with the aid-of the accompanyingdrawings and the novel features will be pointed out in the claims.

Figure 1 is a side view showing the parts of the machine comprising thisinvention 3 is a front elevation thereof.

assembled. Fig. 2 is a sidesectional elevation of the releaserapparatus. Fig. Fig. 4 is a sectional elevation, and Fig. 5 an endelevation of the pulsator apparatus, showing the valve at one end of itsstroke. Fig. 6 is a view corresponding to Fig. 4 showing the valve atthe opposite end of its stroke.

Fig. 7 is a cross sectional elevation on line AA Fig. 6. Fig. 8 is anexterior view and Fig. 9 a sectional elevation of the teat cup. Fig. 10is a side elevation of the inner casing. Fig. 11 is a part view andsimilar to Fig. 9 but showing the rubber lining collapsed.

Referring to the drawings and .-first to Fig. 1 the usual vacuum tank 1is provided, and exhausted of air by a vacuumpump (not shown on thedrawing) to which is connected the pipe 2. The main vacuum pipe 3 leadsfrom the tank 1 to the receiver 4 of the ejector apparatus. To thisreceiver the main milk ipe 5 leads. Attached to the milk pipe 5 is acock 6 from which a flexible pipe 7 leads to the milk portion 8 of'themilk claw.

A pulsator apparatus 9 is connected to the vacuum pipe 3, and from anipple 10 thereof a flexible pipe 11 leads to the vacuum half 12 of themilk claw.

The receiver 4 of the ejector has a chamber 14 (hereinafter to bedescribed) having a nipple 15 from which leads a flexible pipe 16 to thenipple 10 of the pulsator l7 iden-' tical with the pulsator 9 andconnected to the. pipe 3. The valves of the pulsators are operated by arod 18 which may be reciprocated by any suitable means such as aneccentric and rodfrom a revolving counter-shaftj The-vacuum pipe 3 isfitted with the'usual vacuum gage 20 and relief valve 21.

- 'Upon' a vacuum being created in the tank 1 air is exhausted from thepipe 3, receiver 4, milk pipe 5 and the'interiorof the teat cups; andupon reciprocation of the rod 18 the pulsators 9 will alternatelyextract-air from and admit it to the annular space between the innerlining and the outer wall chamber 14 by the pulsator as will be de-'scribed below.

Figs. 2 and 3 illustrate the ejector apparatus which comprises thereceiver 4 to.

which enters the milk pipe 5 and vacuum pipe 3 as shown. The lid 23closes the top of the receiver which is rendered air-tight by means of arubber ring 24. The lower end of the receiver 4 tapers as shown in thefigures and'is provided with an opening 25 in the front thereof, while avalve seating.

26 having an opening 27 is fixed to the front face of the receiver, theopening 27 being opposite the opening 25. A flap valve 28 ofthe swingingtype is pivoted at 29 tothe valve seating whilea rubber ring 30 em-'-bedded in a groove in the valve seating enables the flap valve 28 tomake an air-tight joint with the valve seating. The ejector chamber 14is of "any suitable shape, but preferably as shown in Fig. 2, and has aflange ring 31 fixed to its upper end which ring has a perforatedprojection engaging over a lug 32 projecting from the upper part of thevalve seating 26. A rubber ring 33 embedded in a groove provided in theface of the ring 31 makes an air-tight joint between the chamber 14 andthe seating 26. It will be seen from the manner in which the receiver 14is attached that the joint is made air-tight by virtue of the weight ofthe chamber which may be easily removed for the purpose of cleaning. Thepipe 16 attached to the nipple 15 connects the chamber 14 with thepulsator (see Fig. 1). At the lower end of the ejector chamber 14 avalve seating 35 is provided. Pivoted on theupper end of the valveseating is a flap valve 36 while a rubber ring 37 in the valve seatinginsures an airtight joint being made with the valve 36. Upon air beingexhausted from'the receiver 4 by the pipe 3 the milk flows into thereceiver and falls to the bottom thereof. Then when air is exhaustedfrom the chamber 14 by means of the pulsator 17 an equilibrium ofpressure is caused in the receiver 4 and the chamber 14. The milk thenflows into the ejector chamber 14 which being exhausted of air the milkwill be entrapped therein. Upon, however, the next pulsation takingplace so that the interior of the chamber 14 is again brought toatmospheric pressure the flap valve 28 will l close and the valve 36will be opened by the weight of the milk. Immediately the milk haspassed through the valve 36 the chamber 14 will again'be exhausted ofair and cause the valve 36 to close.

Referring now to Figs. 4 to 7 inclusive the pulsator comprises a casing39 having a semi-circular, valve race 40. Within this valve race a slidevalve 41 having a recess 42 is reciprocated. The casing 39 is providedwith an integra nipple 10 hereinbefore referred to from which theflexible pipe 11 leads to the milk claw, and thence communicates withthe annular space between the flexible inner lining and outer wall ofthe teat cups. A port 44 leads through this nipple 10 to the valve race;An integral boss 45 projects from the casing 39 through which leads theport 46 to the valve race. A port 48 leads from the port 46 through thetap 49 to the vacuum pipe 3. When the slide valve 41 is moved into theposition shown in Fig. 4, the ports 44, 46 and 48 are in communicationand the vacuum. is produced in the annular space of the teat cups. Whenthe valve is moved.to the other end of its stroke as-shown in Fig. 6 theport 44 is opened to the atmosphere which flows into the annular spaceand compresses the flexible lining upon the teat. The valve 41 is. ofthe same design at both ends, and there is there- I fore no danger ofits being placed in the wrong position. Guides 43 screwed to flanges50.of the casing retain the valve within the race. The rod 18 (seeFig. 1) by which the valve is reciprocated engages in the recess 2 Figs.8' to 11 illustrate the teat cup which comprises a metal inner casing54, the rubber lining 55 of which envelops the upper portlon of thecasing as shown in the figures.

The outer casing 56 fits over the rubber lining 55 the ends thereofbeing turned back upon the beads 57 of the outer casing. The

'upper end of the innercasing 54 is beaded at 58, which bead is adaptedto be forced against the rubber lining when a nut 59 -which is threadedupon the inner casing is screwed up against the other end of the lining.By means of this nut the space between the rubber lining 55 and theouter casing 56 is rendered air-tight with the atmosphere and theexterior 'of the cup is also -rendered substantially air-tight.

The outer casing 56 has a nipple 60 to which the pipe 63 connectingthrough the claw with-the pipe 11 from the pulsator 9 is connected. Thenipple is attached at a convenient height upon the outer casingwhile aport 61 is provided around the inner circumference of the outer casingin order that air pressure may be equally distributed I around therubber lining 55. The lower end of the inner casing is tapered and isprovided with a nipple 62 to which the pipe 63 from the milk claw isattached (see Fig. l).

Openings 64 and 65 are provided-at suitable points in the inner casing.These openings are preferably of the shape shown in Figs. 9 and 10 inorder to insure that the upper part of the rubber lining'will 001-"lapse to a greater extent than the lower part. In- Fig. 9 the rubberlining is shown in the position it assumes when there is an equilibriumof pressure upon the interior of the cupand upon the interior of theouter casing, and'in Fig. 11 it is shown in the position it assumes whenthe space between the rubber lining and outer casing is brought toatmospheric pressure.

The interior of the teat cup when in working position is exhausted ofair, and upon the pulsator having caused a vacuum to exist between therubber lining and the outer casing the said rubber lining will assumeits normal position as shown in Fig. 9, but upon the pulsatorraisingithe space between the outer casing and the rubber lining toatmospheric pressure the rubber lining will immediately collapseinwardlyv and assume a shape according to the shape of the openings 64and 65 and immediately the pulsator exhausts the air from the outeradapted toi -alternately admit and extract casing the rubber lining willfall back to its normal position. It will be seen that by thisconstruction a collapsing action of the rubber lining is obtained. Inthe cup illustrated the collapsing is two-sided, but may be one slded ormore as desired. We find that the two-sided action is the mostsatisfactory. It

will also be seen that by this construction the amount of rubberemployed is small and the shape of the lining is of a very simlple henature, namely'that of a plain tube.

cost of the rubber lining is thus considerably reduced.

We claim 1. Apparatus for the purpose indicated.

vacuum tank, a milk receiver, a vacuum pipe from said tank to saidreceiver, a milk pipe leading to said milk receiver to which said clawand teat cups are connected, an ejector chamber to said receiver, and apulsator air from said chamber substantially as set forth. V

2.111 1 apparatus for the purpose indicated,

a receiver connected respectively with the milk and vacuum pipes andhaving a gravity discharge valve at or near its bottom, an ejectorchamber connected with. said receiver and adapted to receive the milkdischarged through the said discharge valve,

means whereby the ejector chamber may be automatically and alternately,connected with vacuum and 'with'air, and a gravity discharge valve forthe ejector chamber sub,- stantially as set .forth. i

3. In apparatus for the purpose indicated, a receiver connectedrespectively with the milk and vacuum pipes and having a grav- -4. Inapparatus for thepurpose indicated,

a receiver connected respectively with the milk and vacuum pipes, saidreceiver being provided with an opening in the side of the v bottomthereof, a valve seating fixed to the said receiver at said opening, anejector chamber adapted to hang from a pro ection on said valve seating,a gravity discharge valve for the ejector chamber, means. whereby theejector chamber may be automatically and alternately connected with thevacuum and with air, a rubber ring between said chamber and valveseating whereby an airtight joint is made by virtue of the weight incombination, teat cups and a claw, a

of said chamber, and a gravity discharge valve for said opening.

5. In apparatus for the purpose indicated, a pulsator comprisinga"casing having a semi-circular valve race and ports opening into thevalve race, and a slide valve fitting in the valve race and providedwith a recess adapted to connect said ports.

' 6. In apparatus-for the purpose indicated, a pulsator comprising acasing having a semi-circular valve race, ports opening into the valverace, a slide valve fitting in-the valve race and provided with a recessadapted to connect, said ports, one of said ports adapted to establishcommunication with the valve race and the space between the inner liningand outer Wall of the teat cup and also adapted to be alternately incommunication with the recess in said slide valve and 'with theatmosphere, said other port being in communication with said recess insaid slide valve and with the vacuum.

7. a In apparatus for the purpose indicated,

a pulsator comprising a casing having a semi-circular valve race andports opening into the valve race, a slide valve fitting in the valverace and provided with a recess in its under side adapted to connectsaid ports, a lug projecting from said valve whereby it may bereciprocated, and guides secured to flangeson said casing for retainingsaid valve in position.

8. In an apparatus for the purpose specified, a pulsatorcomprising aflanged casing having a semi-circular valve race andports opening intothe valve race a side valve fittedin the valve race, and provided with arecess for connecting said ports, a lug for reciprocating the valve; andguides screwed to the flanges of the casing for retaining the valve inposition. I

9. In apparatus for the purpose indicated,

7 a teat cup comprising an inner casing provided with openings, an outercasing adapt- .ed to be connected to a pulsator, a rubber lining fittingwithin said outer casing, the

collapsing of the rubber lining in an inward direction being allowed bysaid openings in said lnner casing, and means for securing the partstogether, substantially as set forth;

10. In apparatus for the purpose indicated, a teat cup comprising anouter casing, an inner casing, a rubber lining around the inner'casing,said casing having openings, and means'for securing a positivecollapsing action of the'rubber lining by means of the openings intheinner casing.

11. In apparatus for the purpose indicated, a teat cup comprising aninner casing provided with openings, an outer casing adapted to beconnected to a pulsator, a rub ber lining fitting within said outercasing,

the collapsing of therubber lining in an inward direction being allowedby the openings in the said inner casing, means for securing, the partstogether, the internal surspecification in the presence of two subfaceof the outer casing being provided With scribing Witnesses.

a port in order that an equal distribution CLAUDE HUDSON DAVIS.

of air pressure from the pulsator may be ALAN DEVEREAUX CUFF. 5 obtainedupon the rubber lining, substan- \Vitnesses:

tially as set forth. D. M. MENOHIE,

In testimonv whereof, We have signed this A. D. BRODIE.

